(3x+4)*(4x+5)=

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Solution for (3x+4)*(4x+5)= equation: 


Simplifying
(3x + 4)(4x + 5) = 0

Reorder the terms:
(4 + 3x)(4x + 5) = 0

Reorder the terms:
(4 + 3x)(5 + 4x) = 0

Multiply (4 + 3x) * (5 + 4x)
(4(5 + 4x) + 3x * (5 + 4x)) = 0
((5 * 4 + 4x * 4) + 3x * (5 + 4x)) = 0
((20 + 16x) + 3x * (5 + 4x)) = 0
(20 + 16x + (5 * 3x + 4x * 3x)) = 0
(20 + 16x + (15x + 12x2)) = 0

Combine like terms: 16x + 15x = 31x
(20 + 31x + 12x2) = 0

Solving
20 + 31x + 12x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(4 + 3x)(5 + 4x) = 0


Subproblem 1
Set the factor '(4 + 3x)' equal to zero and attempt to solve:

Simplifying
4 + 3x = 0

Solving
4 + 3x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-4' to each side of the equation.
4 + -4 + 3x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 3x = 0 + -4
3x = 0 + -4

Combine like terms: 0 + -4 = -4
3x = -4

Divide each side by '3'.
x = -1.333333333

Simplifying
x = -1.333333333

Subproblem 2
Set the factor '(5 + 4x)' equal to zero and attempt to solve:

Simplifying
5 + 4x = 0

Solving
5 + 4x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-5' to each side of the equation.
5 + -5 + 4x = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 4x = 0 + -5
4x = 0 + -5

Combine like terms: 0 + -5 = -5
4x = -5

Divide each side by '4'.
x = -1.25

Simplifying
x = -1.25
Solution
x = {-1.333333333, -1.25}

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